/**
 * Licensed to Apereo under one or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information regarding copyright ownership. Apereo
 * licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not use
 * this file except in compliance with the License. You may obtain a copy of the License at the
 * following location:
 *
 * <p>http://www.apache.org/licenses/LICENSE-2.0
 *
 * <p>Unless required by applicable law or agreed to in writing, software distributed under the
 * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
 * express or implied. See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apereo.portal.groups;

import org.apereo.portal.spring.locator.EntityTypesLocator;

/** Reference implementation for IEntityStore. */
public class RDBMEntityStore implements IEntityStore {
    private static IEntityStore singleton;

    /** RDBMEntityStore constructor. */
    public RDBMEntityStore() {
        super();
    }

    /**
     * @return org.apereo.portal.groups.IEntity
     * @param key java.lang.String
     * @param type java.lang.Class
     */
    @Override
    public IEntity newInstance(String key, Class type) throws GroupsException {
        if (EntityTypesLocator.getEntityTypes().getEntityIDFromType(type) == null) {
            throw new GroupsException("Invalid group type: " + type);
        }
        return new EntityImpl(key, type);
    }
    /** @return org.apereo.portal.groups.IEntityStore */
    public static synchronized IEntityStore singleton() {
        if (singleton == null) {
            singleton = new RDBMEntityStore();
        }
        return singleton;
    }
}
